<!-- 面包屑 -->
<template>
  <el-breadcrumb separator="/" class="breadcrumb">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
          >{{ item.meta.title }}</span
        >
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
export default {
  name: "Breadcrumb",
  data() {
    return {
      levelList: null,
    };
  },
  watch: {
    $route(route) {
      if (route.path.startsWith("/redirect/")) {
        return;
      }
      this.getBreadcrumb();
    },
  },
  methods: {
    getBreadcrumb() {
      let matched = this.$route.matched.filter(
        (item) => item.meta && item.meta.title
      );
      const first = matched[0];
      if (!this.isDashboard(first)) {
        matched = [{ path: "/", meta: { title: "仪表盘" } }].concat(matched);
      }

      this.levelList = matched.filter(
        (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
      );
    },
    isDashboard(route) {
      const name = route && route.name;
      if (!name) {
        return false;
      }
      return name.trim().toLocaleLowerCase() === "Base".toLocaleLowerCase();
    },

    handleLink(record) {
      const { redirect, path } = record;
      if (redirect) {
        return this.$router.push(redirect);
      }
      this.$router.push(path);
    },
  },
  created() {
    this.getBreadcrumb();
  },
  mounted() {},
};
</script>
<style lang="less" scoped>
@import url("@/assets/css/common-variables.less");
.breadcrumb {
  line-height: @layout-header-height;
  margin-left: 10px;
  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>
